Ruijie Networks Co., Ltd. — AI supply-chain exposure

Ruijie Networks is a Chinese networking vendor that builds the data-center and enterprise switches which stitch servers into clusters. In the AI value chain it sits in the networking layer, producing spine-leaf Ethernet fabric — the tiered switch topology that carries traffic between racks — with particular strength supplying the country's internet and cloud giants. As domestic AI training clusters scale, that switching fabric is what lets large numbers of accelerators talk to each other fast enough to train as one system.

Its real position is geographic as much as technical. With frontier US networking silicon subject to export friction, Chinese hyperscalers need a domestic supplier for the fabric inside their AI build-outs, and Ruijie is one of the incumbents positioned to fill that gap. The model places it in the chain because the network is a hard constraint on cluster scale — but its weight stays modest, reflecting a regional, single-fabric exposure rather than a chain-wide one.